Recent short-range model guidance from global ensembles shows daytime maxima in Jeddah on August 29 centered near 37–38 °C, with limited spread arising from small differences in predicted wind speed, boundary-layer mixing, and Red Sea moisture advection. Clear skies and light westerly flow under a strong subtropical ridge support efficient daytime heating, yet modest strengthening of the sea breeze or slight increases in low-level humidity could cap readings at 37 °C while drier, calmer conditions allow brief excursions to 39 °C or higher. With only two days until resolution, traders are weighting the latest 00Z and 12Z runs alongside climatological August norms of roughly 38 °C, producing closely matched probabilities across the 37–39 °C outcomes.